Autodesk 057B1-41A111-1001 - AutoCAD LT 2010, Руководство пользователя

Страница: 373 / 574

For compatibility with previous releases, contextual fields in blocks and xrefs
are not updated when you insert them in a drawing; instead, the field displays
the last cached value. Therefore, if you want to use a contextual field within
a block, for example, a title block, you must insert the field as an attribute.
For example, a title block can use the CurrentLayoutNumber field as an
attribute. When you insert the title block, the field displays the number of
the layout on which the title block is inserted.
Most fields are not contextual and are updated in blocks and xrefs. Fields in
xrefs are updated based on the host file, not the source xref. These fields do
not have to be placed in attributes. For example, a field that displays the layout
number of a particular layout in a project and that updates if that layout
number changes, is a property of the project. When you create the field, you
select the Project field name, select the project and the layout that you want
in the Project Navigation tree, and then select the property SheetNumber for
the field value to be displayed. This field displays the layout number of that
layout, even if you put the field in a block and insert it in another drawing.
If the layout is removed from the project, it no longer has a layout number,
and the field becomes invalid and displays pound signs.
Some project fields can be inserted as placeholders. For example, when you
create your own callout blocks and label blocks, you can insert the
CurrentLayoutNumber field as a placeholder. Later, when the block is inserted
from the Project Manager, the field displays the layout number of the drawing.
Compatibility with Previous Releases
When a drawing with fields is opened in AutoCAD LT 2004 or earlier, the
fields are not updated; they display the value last displayed in the drawing
before it was opened. If no changes are made to a field, it is updated normally
when it is reopened in a release that supports fields.
See also:
Work with AutoCAD Drawings in AutoCAD LT (page 510)
Work with Text Styles
When you enter text into your drawing, the current text style determines the
text font, size, angle, orientation, and other text characteristics.
Notes and Labels | 353